diff --git a/README.md b/README.md
index 7405ddd..72cd947 100644
--- a/README.md
+++ b/README.md
@@ -438,6 +438,7 @@ https://rancher.com/docs/k3s/latest/en/storage/
 
 ## Longhorn (lightweight/distributed) <a name="pv-longhorn"></a>
 * Requirements: https://longhorn.io/docs/0.8.0/install/requirements/
+  * Debian: `apt install open-iscsi`
 * Install: https://rancher.com/docs/k3s/latest/en/storage/